Refactor test assertions

hello_test.go

@@ -6,17 +6,18 @@ func TestHello(t *testing.T) {
 	t.Run("saying hello to people", func(t *testing.T) {
 		got := Hello("Hoborg")
 		want := "Hello, Hoborg"
-
-		if got != want {
-			t.Errorf("got %q want %q", got, want)
-		}
+		assertMessage(t, got, want)
 	})
 	t.Run("say 'Hello, World' when an empty string is given", func(t *testing.T) {
 		got := Hello("")
-		want := "Hello, World"
+		want := "Hello, Worldi"
+		assertMessage(t, got, want)
+	})
+}
 
+func assertMessage(t testing.TB, got, want string) {
+	t.Helper()
 	if got != want {
 		t.Errorf("got %q want %q", got, want)
 	}
-	})
 }